Find the median, first quartile (Q1), the third quartile (Q3), and the interquartile range (IQR) for the data shown, which is already sorted. The number of data is n= 10.

x
4
4
6
7
12
15
17
23
28
30


Median\displaystyle {M}{e}{d}{i}{a}{n} =
Q1\displaystyle {Q}_{{1}} =
Q3\displaystyle {Q}_{{3}} =
IQR\displaystyle {I}{Q}{R} =